SUBMITTED BY:- MR. NITISH KUMAR SINGH

A Remote Control is a component of an electronics device, most commonly

a television set, DVD player and home theater systems originally used for

operating the television device wirelessly from a short line-of-sight distance.

Remote control has continually evolved and advanced over recent years to

include Bluetooth connectivity, motion sensor enabled capabilities and voice

control.

The earliest examples of remote control was developed in 1898 by Nikola Tesla

, he demonstrated a radio-controlled boat to the public during an electrical

exhibition at Madison Square Garden. Tesla called his boat a "teleautomaton“.

In 1903, Leonardo Torres Quevedo guiding a boat from the shore. Later, he

would try to apply the Telekino to projectiles and torpedoes, but had to

abandon the project for lack of financing.

In the 1980s Steve Wozniak of Apple started a company named CL 9. The

purpose of this company was to create a remote control that could operate

multiple electronic devices.

  The aim of this project is to design a system for conducting data

transfer through high frequency signal.

This system is based on transmission and reception of High

frequency signal. High frequency is a term that refers to alternating

current (AC) having characteristics such that, if the current is input

to an Antenna, an Electromagnetic (EM) Field is generated suitable

for Wireless broadcasting and or communications. These frequencies

cover significant portion of the Electromagnetic Radiation Spectrum,

extending from nine kilohertz (9 kHz),the lowest allocated wireless

communications frequency (it's within the range of human hearing),

to thousands of gigahertz(GHz).

Here we are using a high frequency transmitter for controlling the

equipments there are four equipment that can be controlled through

this remote transmitter, so four different frequencies are using for

controlling the switching of the equipments by the RF

transmitter ,when the RF receiver which is connected to the

microcontroller AT89c51 receives this frequencies it will convert the

frequency information into digital data and applied it to the controller

pins ,microcontroller read this information and follow the instructions

stored in it . Thus it perform the switching of the equipment

Successfully .

 

SOFTWARE REQUIREMENTS

Assembler of ATMEL microcontroller series PADS for PCB designing 

HARDWARE REQUIREMENTS

Microcontroller AT89C51 LM7805 Regulator Power Supply Resistors Capacitors Transistors LEDs Diode Connectors Relays

The AT89C51 is a low-power, high

performance CMOS 8-bit

microcomputer with 4K bytes of

Flash programmable and erasable

read only memory (PEROM), 128

bytes of RAM, 32 I/O lines, two 16-

bit timer/counters, a five vector

two-level interrupt architecture, a

full duplex serial port, on-chip

oscillator and clock circuitry.

VCCSupply voltage.GNDGround.Port 0Port 0 is an 8-bit open-drain bi-directional I/O port. As an output port, each pin can sink eight TTL inputs. When 1s are written to port 0 pins, the pins can be used as high impedance inputs.Port 1Port 1 is an 8-bit bi-directional I/O port with internal pull ups. The Port 1 output buffers can sink/source four TTL inputs. When 1s are written to Port 1 pins they are pulled high by the internal pull ups and can be used as inputs. As inputs,Port 1 pins that are externally being pulled low will sourcecurrent (IIL) because of the internal pull ups.Port 2Port 2 is an 8-bit bi-directional I/O port with internal pull ups. The Port 2 output buffers can sink/source four TTL inputs. When 1s are written to Port 2 pins they are pulled high by the internal pull ups and can be used as inputs.

Port 3Port 3 is an 8-bit bi-directional I/O port with internal pull ups. The Port 3 output buffers can sink/source four TTL inputs. When 1s are written to Port 3 pins they are pulled high by the internal pull ups and can be used as inputs. As inputs, Port 3 pins that are externally being pulled low will source current (IIL) because of the pull ups.RSTReset input. A high on this pin for two machine cycles while the oscillator is running resets the device.ALE/PROG Address Latch Enable output pulse for latching the low byte of the address during accesses to external memory. This pin is also the program pulse input (PROG) during Flash programming. In normal operation ALE is used for external timing or clockinput purposes. PSENProgram Store Enable is the read strobe to external program memory. When the AT89C51 is executing code from external program memory, PSEN is activated twice each machine cycle, except that two PSEN activations are skipped during each access to external data memory.

EA/VPPExternal Access Enable. EA must be strapped to GND in order to enable the device to fetch code from external program memory locations starting at 0000H up to FFFFH. However, that if lock bit 1 is programmed, EA will be internally latched on reset. EA should be strapped to VCC for internal program executions. This pin also receives the 12-volt programming enable voltage(VPP) during Flash programming, for parts that require 12-volt VPP.

XTAL1Input to the inverting oscillator amplifier and input to the internal clock operating circuit.

XTAL2Output from the inverting oscillator amplifier.

Max. Forward Voltage:

1.0V

Max. Reverse Voltage:

1000V

Diode(1N4007)

CAPACITORS & TRANSISTORS

Electrolytic Capacitors

Ceramic Capacitors

BC547 Transistor

A LM7805 ends with "05"; thus, it outputs 5 volts.

LM78XX: Voltage regulators that output positive voltage, "XX"=voltage output. LM79XX: Voltage regulators that output negative voltage, "XX"=voltage output

The LM7805, like most other regulators, is a three-pin IC.Pin 1 (Input Pin): The Input pin is the pin that accepts the incoming DC voltage, which the voltage regulator will eventually regulate down to 5 volts. Pin 2 (Ground): Ground pin establishes the ground for the regulator. Pin 3 (Output Pin): The Output pin is the regulated 5 volts DC.

LM7805 Voltage Regulator

SPDT RELAY

XTAL OSCILATTOR

LED

• Industry

Remote control is used for controlling substations, pump storage power stations .

•  Military

IED jamming systems, Radio jamming, Electronic warfare. The distances for military

remote controls also tend to be much longer, up to intercontinental distance satellite

linked remote controls used by the U.S. for their unmanned airplanes (drones) in

Afghanistan, Iraq and Pakistan.

Remote controls are used by insurgents in Iraq and Afghanistan to attack coalition

and government troops with roadside IEDs. The resistance in Iraq is reported in the

media to use modified TV remote controls to detonate the bombs.

•Military history

In World War I, the Imperial German Navy employed FL-boats (Fernlenkboote) against

coastal shipping. These were driven by internal combustion engines, and controlled

remotely from a shore station through several miles of wire wound on a spool on the

boat. The Soviet Red Army used remotely controlled tele tanks during World War II. A

teletank is controlled by radio from a control tank at a distance of 500 to 1,500

meters, the two constituting a telemechanical group. There were also remotely

controlled cutters and experimental remotely controlled planes in the Red Army.

• Space

Remote control technology is also used in space travel, for instance the

Soviet Lunokhod vehicles were remote-controlled from the ground.

Many space exploration rovers can be remotely controlled.

•Video games

Video game consoles had not used wireless controllers until recently, mainly

because of the difficulty involved in playing the game while keeping the

infrared transmitter pointed at the console. The first official wireless game

controller made by a first party manufacturer was the Wave Bird for Nintendo

GameCube. In the current generation of gaming consoles, wireless controllers

are now standard.

Some wireless controllers, such as the Sony PS3 and Nintendo Wi-Fi,

use Bluetooth. Others, like the Xbox 360, use proprietary wireless protocols.

•PC control

Existing infrared remote controls can be used to control PC applications. Any

application that supports shortcut keys can be controlled via IR remote

controls from other home devices (TV, VCR, AC). This is widely used with

multimedia applications for PC based home theatre system

Power Supply Section > Microcontroller Sec. > Transceiver Sec. > Relay Sec.

In this competitive corporate world every organization wants to improve the

efficiency as well as its productivity. To improve the efficiency of organization,

automation is a preferred solution.

 

This system is based on high frequency remote control it control any equipment

remotely at high frequency (30-50MHz), through remote we can switch the device

through a distant place .Now here is no need to go to switch board and switching

the devices on and off, one can easily perform this switching from anywhere. It

ease the man power pressure.